function changeClass(id, newClassName)
  {
	if(document.getElementById(id))
		{ 
       		document.getElementById(id).className = newClassName;
       		return true;
    		}
	else
		{
    		return false;
		}
  }

  var datum = new Date();
  var weekdag = new Array("Zondag","Maandag","Dinsdag","Woensdag","Donderdag","Vrijdag","Zaterdag");
  var maand = new Array("januari","februari","maart","april","mei","juni","juli","augustus","september","oktober","november","december"); 
  var dedag = weekdag[datum.getDay()] + " " + datum.getDate() + " " + maand[datum.getMonth()] + "  " + datum.getFullYear();


function doemarge()
  {
  var de_breedte;
   if (typeof window.innerWidth != 'undefined')
      {
      de_breedte = window.innerWidth;
      }
    else
      {
      de_breedte = document.getElementsByTagName('body')[0].clientWidth;
      }

  document.getElementById("marge").style.left = Math.round(( de_breedte - 900)/2) + "px";
    if ( de_breedte < 900)
      {
      document.getElementById("marge").style.left = "-0px";
      }
   
  }



var aanuit = new Array(1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1);
var no_2 = "$";
var id_2 = "$";
var lijst_2 = "$";

function doe_in_uit(no, id, lijst)
    {
	if(aanuit[parseInt(no)] == 1)
		{
		changeClass(id, 'uit');
		changeClass(lijst, 'dis_ja');
		}
	else
		{
		changeClass(id, 'in');
		changeClass(lijst, 'dis_nee');
		}
	aanuit[parseInt(no)] = aanuit[parseInt(no)]*-1;
	
	if(no != no_2 && no_2 != "$")
	    {
	    changeClass(id_2, 'in');
		changeClass(lijst_2, 'dis_nee');
		aanuit[parseInt(no_2)] = 1;
	    }
	
	
	no_2 = no;
    id_2 = id;
    lijst_2 = lijst;
	
	}